ISO15693 Tag IC with 64-bit UID, AFI, DSFID, anti-collision, kill function and 2048-bit

The LRI2K is a contactless memory powered by the received carrier electromagnetic wave. It is a 2048-bit electrically erasable programmable memory (EEPROM). The memory is organized as 64 blocks of 32 bits. The LRI2K is accessed via the 13.56 MHz carrier electromagnetic wave on which incoming data are demodulated from the received signal amplitude modulation (ASK: amplitude shift keying). The received ASK wave is 10% or 100% modulated with a data rate of 1.6 Kbit/s using the 1/256 pulse coding mode or a data rate of 26 Kbit/s using the 1/4 pulse coding mode.

Outgoing data are generated by the LRI2K load variation using Manchester coding with one or two subcarrier frequencies at 423 kHz and 484 kHz. Data are transferred from the LRI2K at 6.6 Kbit/s in low data rate mode and 26 Kbit/s fast data rate mode. The LRI2K supports 53 Kbit/s in high data rate mode with one subcarrier frequency at 423 kHz.

The LRI2K follows the ISO 15693 recommendation for radio-frequency power and signal interface.

Key Features

  • Belongs to the ST25 family, that includes all STMicroelectronics NFC/RFID tag and reader products
  • ISO 15693 standard fully compliant
  • ISO 18000-3 Mode 1 standard fully compliant
  • 13.56 MHz ±7 kHz carrier frequency
  • To tag: 10% or 100% ASK modulation using 1/4 (26 Kbit/s) or 1/256 (1.6 Kbit/s) pulse position coding
  • From tag: load modulation using Manchester coding with 423 kHz and 484 kHz subcarriers in low (6.6 Kbit/s) or high (26 Kbit/s) data rate mode. Supports the 53 Kbit/s data rate with Fast commands
  • Internal tuning capacitor (21 pF or 97 pF)
  • 1 000 000 Erase/Write cycles (minimum)
  • 40 year data retention (minimum)
  • 2048 bits EEPROM with Block Lock feature
  • 64-bit unique identifier (UID)
  • Electrical article surveillance capable (software controlled)
  • Kill function
  • Read & Write (Block of 32 bits)
  • 5 ms programming time


Technical Documentation

Product Specifications
Description Version Size
DS4631 DS4631: 2048-bit EEPROM tag IC at 13.56 MHz, with 64-bit UID and kill code, ISO 15693 and ISO 18000-3 Mode 1 compliant 9.0 1 MB
Application Notes
Description Version Size
AN4054 AN4054: Comparison of RF addressing modes of low-density and high-density ISO/IEC 15693 devices 4.0 273 KB
AN3408 AN3408: Using LRIxx, LRISxx, M24LRxx-R and M24LRxxE-R products as NFC vicinity tags 4.1 962 KB
AN3992 AN3992: Using an STM8L162M8 AES hardware accelerator with a CR95HF to encrypt contactless tag data memory 3.2 844 KB
AN2319 AN2319: Using the 64-bit UID in contactless RFID applications 2.2 64 KB
AN3985 AN3985: Using the CR95HF library with STM8L microcontrollers 2.2 1 MB
Technical Notes & Articles
Description Version Size
TN0076 TN0076: Improving PCB traceability with RFID technology 1.5 345 KB
TN0047 TN0047: LRI2K, an RFID IC with EAS and privacy protection for smart library labels 1.4 128 KB

Tools and Software

Embedded Software
MCUs Embedded Software
ST25 - NFC / RFID Software
Support & Community

Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
LRI2K-SBN18/1GE Ni/Au Wafer Not Applicable -20 85 NRND 0.12 10000 NEC EAR99 - MORE INFO No availability reported, please contact our Sales office

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
LRI2K-SBN18/1GE NRNDNi/Au WaferIndustrialN/A 0 0

(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.